Essays about: "Glass transition temperature"

Showing result 21 - 25 of 25 essays containing the words Glass transition temperature.

  1. 21. Analysis of vortex movement in an YBCO thin film : Models of the vortex solid-to-liquid transition compared to a sensitive resistive measurement of a strongly pinned YBCO thin film

    University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Author : Alex Ellgren; [2013]
    Keywords : High-temperature superconductor; YBCO; vortex dynamics; glass transition; vortex glass; vortex molasses;

    Abstract : When a high-temperature superconductor transitions in the presence of a magnetic field, the resistance does not immediately go to zero. Instead, the transition is smoothed by the resistive effects of moving vortices so that perfect conductivity isn't reached until several K below Tc, where the vortices have frozen into a glass state. READ MORE

  3. 22. Synthesis and assembly of biodegradable/ compatiblegraft copolymers for biomedical applications

    University essay from Institutionen för kemi - Ångström

    Author : Kristina Nilsson; [2011]
    Keywords : ;

    Abstract : The synthesis and characterization  of nanostructured block copolymers is described.Block copolymers were grafted onto a backbone polymer  that consists of themonomer  MTC-BuOBn.  The block copolymers have a part consisting of PTMC(trimethylene  carbonate) and a part consisting of PLLA. READ MORE

  4. 23. Emulsion polymerization of vinyl acetate with renewable raw materials as protective colloids

    University essay from KTH/Skolan för kemivetenskap (CHE)

    Author : Hanna Lange; [2011]
    Keywords : Poly vinyl alcohol PVA ; Hydroxyethyl cellulose HEC ; Emulsion polymerization; Protective colloid; Starch;

    Abstract : Emulsion polymerizations of vinyl acetate (VAc) were performed by fully or partially replacing poly(vinyl alcohol) (PVA) with renewable materials as protective colloids or by adding renewable materials, as additives or fillers, to the emulsions during or after polymerization. The purpose of the study was to increase the amount of renewable materials in the emulsion. READ MORE

  5. 24. Microstructure and Temperature Stability of APFO-3:PCBM Organic Photovoltaic Blends

    University essay from Biomolekylär och Organisk Elektronik

    Author : Jonas Bergqvist; [2010]
    Keywords : conjugated polymer; organic semiconductor; organic photovoltaic; organic solar cell; bulk-heterojunction; microstructure; temperature stability;

    Abstract : In this thesis, the microstructure of organic photovoltaic APFO-3:PC61BM bulk-heterojunction blends was examined. Earlier studies have focused on the microstructure after spin coating. READ MORE

  6. 25. The glass transition in high-temperature superconductors

    University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Author : Peter Berglund; [2010]
    Keywords : ;

    Abstract : In high-temperature superconductors a large region of the magnetic phase diagram is occupied by a vortex phase. This vortex phase can be divided into two regions. At lower temperatures the vortices are in a truly superconducting solid phase. At higher temperatures the solid changes to a dissipative vortex liquid. READ MORE